Tank structure



Jan. 14, 1930. E. J. BORGMAN ET AL 1,743,109

' TANK STRUCTURE Filed Nov. 19, 1926 2 Sheets- 5me? 1 Fly. 1.

WITNESSES:

. INVENTORS Eric/Q 7. Bory'mcm And Geoi'ye White Jr. M B

,' ATTORNEY E, J. BORGMAN ET AL TANK STRUCTURE Fil ed Nov. 19, 1925 2 Sheets-Sheet INVENTORS J: Bergman r e Wfiz'ze J7, Y 4

A TTORNEY WITNESSES;

I It has heretofore been a Patented Jan. 14, 1930 UNITED STATES PATENT OFFICE ERICH J. BORGMAN, OF EDGEWOOD, AND GEORGE WHITE, JR., OF SWISSVAL-E, I'ENN- SYLVANIA, ASSIGNORS TO WESTINGHOUSE ELECTRIC AND MANUFACTURING COM- PANY, A CORPORATION OF PENNSYLVANIA TANK STRUCTURE Application filed November Our invention relates to tanks for oilimmersed electrical apparatus and particularly to the methods and details of construction of such tanks.

One object of our invention is to provide a tank structure having corrugated side walls that may be assembled from standard metal shapes without the necessity of subjecting them to bending operations.

Another object of our invention is to provide a tank structure having a corrugated side wall in which it is unnecessary to flatten or otherwise distort the shapes of the individual corrugations.

In casings or tanks for oil-immersed electical apparatus, it is particularly desirable that the side walls of the tank be made relatively thin and corrugated, in order to permit the rapid dissipation of heat and to present a greater radiating surface to the atmosphere.

difficult and expensive operation to secure the corrugated side walls to the end or bracing frames in such tanks with fluid-tight joints.

In accordance with our invention, there is provided a bracing frame of connected'angle irons that are provided with serrations in their extending legs. The shapes of the serrations in the several legs correspond to the shapes of the corrugations in the side walls of the tank, in order that the corrugations on the side Walls may be fitted into the serrations in the legs of the angle irons and secured, as by welding, thereto.

In the accompanying drawings,

Fig. 1 is a plan view of a casing embodying our invention,

Fig. 2 is a'sectional view of the tank, taken along the section line IIII of Fig. 1,

Fig. 3 is a fragmentary plan View of an angle iron, embodying our invention,

Fig. 4 is a fragmentary sectional view of the angle iron shown in Fig. 3, showing the method of securing the side wall thereto,

Figs. 5 and 6 are views similar to Figs. 3 and 4, respectively, showing the application of our invention to a commercial Z bar,

Figs. 7 and 8 are views, similar to Fig. 4, showing the application of our invention to a channel iron and to a T bar, respectively.

19, 1926. Serial No. 149,300.

Referring to Figs. 1 to 4, our invention comprises, in general, a casing or tank 1 that is adapted to be filled with an insulating oil for submerglng an electrical device, (not shown) and which is constituted by upper and lower bracing frames 2 that are connected to corrugated side walls 3.

The bracing frames 2 are constituted by a plurality of angle irons 4 that are connected to one another by welded scams 5 and corner plates 6. The lower frame 2 is provided w1th a bottom member 7 for supporting the electrical apparatus (not shown). Each of the angle irons 4 is provided with a plurality of serrations 8 along its outer leg.

The side walls 3 are formed by bendin sheet metal into a plurality of corrugations, the shapes of which correspond to theshapes of the serrations in the several angle irons 4.

In assembling the tank, the bracing frames are connected with their serrated edges facing outwardly. The corrugated side walls 3 are then fitted into the serrations 8 and secured thereto, as at 9, by a welding operation. The several side walls 3 are then connected to each other by continuing the joint or seam 5 downwardly to complete a fluid tight joint.

In Figs. 5 and 6, we show a modified form of our invention, in which the serrations 8 are placed in a leg of a Z bar 11.

In Fig. 7 we show a modified form of our invention, in which the side walls 3 are welded to one of the legs of a channel bar 12.

In Fig. 8, we show a modified form of our nvention, in which the serrations 8 are placed in the leg of a T bar 13. It is to be understood that the term angle iron, as employed in the specification and claims, is intended to be generic to all forms of pre-shaped-metal supporting structures such as are well-known to the engineering profession. 4

Accordingly, it will be seen that we have devised a method of manufacturing fluidtight casings, having corrugated side walls, in which bracing frames are provided for making a snug fit with the side walls without the necessity of especially shaping the individual members of the bracing frame, or w1thout the necessity of flattening or other- Wise distorting the shapes of the individual corrugations of the side Wall.

It is to be understood that various changes in the shape, number, arrangement and disposition of the accompanying parts of our invention may be made in the scope of our invention.

We claim as our invention:

1. In a tank structure, a bracing member comprising an angle iron having a serrated leg, and a Wall member having serrations conforming to the serrations of the leg and secured thereto.

2. In a tank structure, a bracing member comprising an angle iron having a serrated leg, and a Wall member fitted into the serrations of the angle iron and Welded thereto.

3. The method of constructing a tank Which consists in serrating a leg of an angle 1 iron, separately bending a body of sheet material to correspond to the serrations of the angle iron, and then fitting the body member intothe serrations of the angle'iron and securing it thereto.

4. The method of' constructing a tank Which consists in serrating a leg of an angle iron, separately bending a body of sheet material to correspond to the serrations of the angle iron, and then fitting the body member into the serrations of the angle iron and Welding it thereto.

5. In a casing construction, a frame member comprising a plurality of connected angle iron members each of Which has a serrated and corrugated sheet-metal side-Wall members fitting into the serrations of the legs and Welded thereto.

6. In a casing construction, a frame member comprising a plurality of connected angle iron members, each of Which has a serrated leg, and corrugated sheet-metal side-Wall members fitting'into the serrations of the legs and Welded thereto, the several side-Wall members being provided with fluid-tight connecting seams.

In testimony 'Whereof, We have hereunto subscribed our names this 15th day of November, 1926.

ERICH J. BORGMAN. GEORGE WHITE. JR. 

